• Zero-dependency Go CLI that reads local session logs from Claude Code, OpenAI Codex, and Gemini CLI to break down spend by project, provider, and git branch.
• Runs entirely locally — nothing leaves the machine — and estimates cost at API list price for comparing projects and spotting trends.

See where your AI coding spend actually goes. costblame parses the session logs Claude Code, Codex, and Gemini CLI already write to disk and rolls them up by project, provider, and branch, with zero external dependencies and nothing sent over the network.